Merge branch 'master' of https://github.com/browngraphicslab/Dash-Web

6 files changed, 464 insertions, 87 deletions

diff --git a/src/client/views/presentationview/PresentationElement.tsx b/src/client/views/presentationview/PresentationElement.tsx
index 36f1178f1..11f3eb846 100644
--- a/src/client/views/presentationview/PresentationElement.tsx
+++ b/src/client/views/presentationview/PresentationElement.tsx
@@ -1,6 +1,6 @@
 import { library } from '@fortawesome/fontawesome-svg-core';
 import { faFile as fileRegular } from '@fortawesome/free-regular-svg-icons';
-import { faArrowUp, faFile as fileSolid, faFileDownload, faLocationArrow, faSearch } from '@fortawesome/free-solid-svg-icons';
+import { faArrowUp, faFile as fileSolid, faFileDownload, faLocationArrow, faSearch, faArrowRight } from '@fortawesome/free-solid-svg-icons';
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
 import { action, computed, observable, runInAction } from "mobx";
 import { observer } from "mobx-react";
@@ -9,17 +9,22 @@ import { Id } from "../../../new_fields/FieldSymbols";
 import { List } from "../../../new_fields/List";
 import { listSpec } from "../../../new_fields/Schema";
 import { BoolCast, Cast, NumCast, StrCast } from "../../../new_fields/Types";
-import { Utils } from "../../../Utils";
+import { Utils, returnFalse, emptyFunction, returnOne } from "../../../Utils";
 import { DragManager, dropActionType, SetupDrag } from "../../util/DragManager";
 import { SelectionManager } from "../../util/SelectionManager";
-import "./PresentationView.scss";
+import { ContextMenu } from "../ContextMenu";
+import { Transform } from "../../util/Transform";
+import { DocumentView } from "../nodes/DocumentView";
+import { DocumentType } from "../../documents/Documents";
 import React = require("react");
 
+
 library.add(faArrowUp);
 library.add(fileSolid);
 library.add(faLocationArrow);
 library.add(fileRegular as any);
 library.add(faSearch);
+library.add(faArrowRight);
 
 interface PresentationElementProps {
     mainDocument: Doc;
@@ -46,6 +51,7 @@ export enum buttonIndex {
     FadeAfter = 3,
     HideAfter = 4,
     Group = 5,
+    OpenRight = 6
 
 }
 
@@ -63,12 +69,9 @@ export default class PresentationElement extends React.Component<PresentationEle
     private backUpDoc: Doc | undefined;
 
 
-
-
-
     constructor(props: PresentationElementProps) {
         super(props);
-        this.selectedButtons = new Array(6);
+        this.selectedButtons = new Array(7);
 
         this.presElRef = React.createRef();
     }
@@ -104,6 +107,9 @@ export default class PresentationElement extends React.Component<PresentationEle
         }
     }
 
+    /**
+     * Function that will be called to receive stored backUp for buttons
+     */
     receiveButtonBackUp = async () => {
 
         //get the list that stores docs that keep track of buttons
@@ -132,7 +138,7 @@ export default class PresentationElement extends React.Component<PresentationEle
 
         if (!foundDoc) {
             let newDoc = new Doc();
-            let defaultBooleanArray: boolean[] = new Array(6);
+            let defaultBooleanArray: boolean[] = new Array(7);
             newDoc.selectedButtons = new List(defaultBooleanArray);
             newDoc.docId = this.props.document[Id];
             castedList.push(newDoc);
@@ -395,6 +401,22 @@ export default class PresentationElement extends React.Component<PresentationEle
     }
 
     /**
+     * Function that opens up the option to open a element on right when navigated,
+     * instead of openening it as tab as default.
+     */
+    @action
+    onRightTabClick = (e: React.MouseEvent) => {
+        e.stopPropagation();
+        if (this.selectedButtons[buttonIndex.OpenRight]) {
+            this.selectedButtons[buttonIndex.OpenRight] = false;
+            // action maybe
+        } else {
+            this.selectedButtons[buttonIndex.OpenRight] = true;
+        }
+        this.autoSaveButtonChange(buttonIndex.OpenRight);
+    }
+
+    /**
      * Creating a drop target for drag and drop when called.
      */
     protected createListDropTarget = (ele: HTMLDivElement) => {
@@ -629,7 +651,7 @@ export default class PresentationElement extends React.Component<PresentationEle
      */
     getSelectedButtonsOfDoc = async (paramDoc: Doc) => {
         let castedList = Cast(this.props.presButtonBackUp.selectedButtonDocs, listSpec(Doc));
-        let foundSelectedButtons: boolean[] = new Array(6);
+        let foundSelectedButtons: boolean[] = new Array(7);
 
         //if this is the first time this doc mounts, push a doc for it to store
         for (let doc of castedList!) {
@@ -649,7 +671,6 @@ export default class PresentationElement extends React.Component<PresentationEle
 
     //This is used to add dragging as an event.
     onPointerEnter = (e: React.PointerEvent): void => {
-        this.props.document.libraryBrush = true;
         if (e.buttons === 1 && SelectionManager.GetIsDragging()) {
             let selected = NumCast(this.props.mainDocument.selectedDoc, 0);
 
@@ -666,7 +687,6 @@ export default class PresentationElement extends React.Component<PresentationEle
 
     //This is used to remove the dragging when dropped.
     onPointerLeave = (e: React.PointerEvent): void => {
-        this.props.document.libraryBrush = false;
         //to get currently selected presentation doc
         let selected = NumCast(this.props.mainDocument.selectedDoc, 0);
 
@@ -765,9 +785,86 @@ export default class PresentationElement extends React.Component<PresentationEle
             groupArray.push(tempStack.pop()!);
         }
     }
+    /**
+     * This function is a getter to get if a document is in previewMode.
+     */
+    private get embedInline() {
+        return BoolCast(this.props.document.embedOpen);
+    }
+
+    /**
+     * This function sets document in presentation preview mode as the given value.
+     */
+    private set embedInline(value: boolean) {
+        this.props.document.embedOpen = value;
+    }
 
+    /**
+     * The function that recreates that context menu of presentation elements.
+     */
+    onContextMenu = (e: React.MouseEvent<HTMLDivElement>) => {
+        e.preventDefault();
+        e.stopPropagation();
+        ContextMenu.Instance.addItem({ description: this.embedInline ? "Collapse Inline" : "Expand Inline", event: () => this.embedInline = !this.embedInline, icon: "expand" });
+        ContextMenu.Instance.displayMenu(e.clientX, e.clientY);
+    }
 
+    /**
+     * The function that is responsible for rendering the a preview or not for this
+     * presentation element.
+     */
+    renderEmbeddedInline = () => {
+        if (!this.embedInline) {
+            return (null);
+        }
 
+        let propDocWidth = NumCast(this.props.document.nativeWidth);
+        let propDocHeight = NumCast(this.props.document.nativeHeight);
+        let scale = () => {
+            let newScale = 175 / NumCast(this.props.document.nativeWidth, 175);
+            return newScale;
+        };
+        return (
+            <div style={{
+                position: "relative",
+                height: propDocHeight === 0 ? 100 : propDocHeight * scale(),
+                width: propDocWidth === 0 ? "auto" : propDocWidth * scale(),
+                marginTop: 15
+
+            }}>
+                <DocumentView
+                    fitToBox={StrCast(this.props.document.type).indexOf(DocumentType.COL) !== -1}
+                    Document={this.props.document}
+                    addDocument={returnFalse}
+                    removeDocument={returnFalse}
+                    ScreenToLocalTransform={Transform.Identity}
+                    addDocTab={returnFalse}
+                    renderDepth={1}
+                    PanelWidth={() => 350}
+                    PanelHeight={() => 90}
+                    focus={emptyFunction}
+                    selectOnLoad={false}
+                    parentActive={returnFalse}
+                    whenActiveChanged={returnFalse}
+                    bringToFront={emptyFunction}
+                    zoomToScale={emptyFunction}
+                    getScale={returnOne}
+                    ContainingCollectionView={undefined}
+                    ContentScaling={scale}
+                />
+                <div style={{
+                    width: " 100%",
+                    height: " 100%",
+                    position: "absolute",
+                    left: 0,
+                    top: 0,
+                    background: "transparent",
+                    zIndex: 2,
+
+                }}></div>
+            </div>
+        );
+    }
 
     render() {
         let p = this.props;
@@ -784,7 +881,7 @@ export default class PresentationElement extends React.Component<PresentationEle
         let dropAction = StrCast(this.props.document.dropAction) as dropActionType;
         let onItemDown = SetupDrag(this.presElRef, () => p.document, this.move, dropAction, this.props.mainDocument[Id], true);
         return (
-            <div className={className} key={p.document[Id] + p.index}
+            <div className={className} onContextMenu={this.onContextMenu} key={p.document[Id] + p.index}
                 ref={this.presElRef}
                 onPointerEnter={this.onPointerEnter} onPointerLeave={this.onPointerLeave}
                 onPointerDown={onItemDown}
@@ -809,7 +906,10 @@ export default class PresentationElement extends React.Component<PresentationEle
                     this.changeGroupStatus();
                     this.onGroupClick(p.document, p.index, this.selectedButtons[buttonIndex.Group]);
                 }}> <FontAwesomeIcon icon={"arrow-up"} /> </button>
+                <button title="Open Right" className={this.selectedButtons[buttonIndex.OpenRight] ? "presentation-interaction-selected" : "presentation-interaction"} onPointerDown={(e) => e.stopPropagation()} onClick={this.onRightTabClick}><FontAwesomeIcon icon={"arrow-right"} /></button>
 
+                <br />
+                {this.renderEmbeddedInline()}
             </div>
         );
     }
diff --git a/src/client/views/presentationview/PresentationList.tsx b/src/client/views/presentationview/PresentationList.tsx
index 2d63d41b5..e853c4070 100644
--- a/src/client/views/presentationview/PresentationList.tsx
+++ b/src/client/views/presentationview/PresentationList.tsx
@@ -7,8 +7,6 @@ import { Doc, DocListCast, DocListCastAsync } from "../../../new_fields/Doc";
 import { NumCast, StrCast } from "../../../new_fields/Types";
 import { Id } from "../../../new_fields/FieldSymbols";
 import PresentationElement, { buttonIndex } from "./PresentationElement";
-import { DragManager } from "../../util/DragManager";
-import { CollectionDockingView } from "../collections/CollectionDockingView";
 import "../../../new_fields/Doc";
 
 
diff --git a/src/client/views/presentationview/PresentationModeMenu.scss b/src/client/views/presentationview/PresentationModeMenu.scss
new file mode 100644
index 000000000..336f43d20
--- /dev/null
+++ b/src/client/views/presentationview/PresentationModeMenu.scss
@@ -0,0 +1,30 @@
+.presMenu-cont {
+    position: fixed;
+    z-index: 10000;
+    height: 35px;
+    background: #323232;
+    box-shadow: 3px 3px 3px rgba(0, 0, 0, 0.25);
+    border-radius: 0px 6px 6px 6px;
+    overflow: hidden;
+    display: flex;
+
+    .presMenu-button {
+        background-color: transparent;
+        width: 35px;
+        height: 35px;
+    }
+
+    .presMenu-button:hover {
+        background-color: #121212;
+    }
+
+    .presMenu-dragger {
+        height: 100%;
+        transition: width .2s;
+        background-image: url("https://logodix.com/logo/1020374.png");
+        background-size: 90% 100%;
+        background-repeat: no-repeat;
+        background-position: left center;
+    }
+
+}
\ No newline at end of file
diff --git a/src/client/views/presentationview/PresentationModeMenu.tsx b/src/client/views/presentationview/PresentationModeMenu.tsx
new file mode 100644
index 000000000..4de8da587
--- /dev/null
+++ b/src/client/views/presentationview/PresentationModeMenu.tsx
@@ -0,0 +1,100 @@
+import React = require("react");
+import { observable, action, runInAction } from "mobx";
+import "./PresentationModeMenu.scss";
+import { observer } from "mobx-react";
+import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
+
+
+export interface PresModeMenuProps {
+    next: () => void;
+    back: () => void;
+    presStatus: boolean;
+    startOrResetPres: () => void;
+    closePresMode: () => void;
+}
+
+/**
+ * This class is responsible for modeling of the Presentation Mode Menu. The menu allows
+ * user to navigate through presentation elements, and start/stop the presentation.
+ */
+@observer
+export default class PresModeMenu extends React.Component<PresModeMenuProps> {
+
+    @observable private _top: number = 20;
+    @observable private _right: number = 0;
+    @observable private _opacity: number = 1;
+    @observable private _transition: string = "opacity 0.5s";
+    @observable private _transitionDelay: string = "";
+
+
+    private _mainCont: React.RefObject<HTMLDivElement> = React.createRef();
+
+    /**
+     * The function that changes the coordinates of the menu, depending on the
+     * movement of the mouse when it's being dragged.
+     */
+    @action
+    dragging = (e: PointerEvent) => {
+        this._right -= e.movementX;
+        this._top += e.movementY;
+
+        e.stopPropagation();
+        e.preventDefault();
+    }
+
+    /**
+     * The function that removes the event listeners that are responsible for
+     * dragging of the menu.
+     */
+    dragEnd = (e: PointerEvent) => {
+        document.removeEventListener("pointermove", this.dragging);
+        document.removeEventListener("pointerup", this.dragEnd);
+        e.stopPropagation();
+        e.preventDefault();
+    }
+
+    /**
+     * The function that starts the dragging of the presentation mode menu. When
+     * the lines on further right are clicked on.
+     */
+    dragStart = (e: React.PointerEvent) => {
+        document.removeEventListener("pointermove", this.dragging);
+        document.addEventListener("pointermove", this.dragging);
+        document.removeEventListener("pointerup", this.dragEnd);
+        document.addEventListener("pointerup", this.dragEnd);
+
+        e.stopPropagation();
+        e.preventDefault();
+    }
+
+    /**
+     * The function that is responsible for rendering the play or pause button, depending on the
+     * status of the presentation.
+     */
+    renderPlayPauseButton = () => {
+        if (this.props.presStatus) {
+            return <button title="Reset Presentation" className="presMenu-button" onClick={this.props.startOrResetPres}><FontAwesomeIcon icon="stop" /></button>;
+        } else {
+            return <button title="Start Presentation From Start" className="presMenu-button" onClick={this.props.startOrResetPres}><FontAwesomeIcon icon="play" /></button>;
+        }
+    }
+
+    render() {
+        return (
+            <div className="presMenu-cont" ref={this._mainCont}
+                style={{ right: this._right, top: this._top, opacity: this._opacity, transition: this._transition, transitionDelay: this._transitionDelay }}>
+                <button title="Back" className="presMenu-button" onClick={this.props.back}><FontAwesomeIcon icon={"arrow-left"} /></button>
+                {this.renderPlayPauseButton()}
+                <button title="Next" className="presMenu-button" onClick={this.props.next}><FontAwesomeIcon icon={"arrow-right"} /></button>
+                <button className="presMenu-button" title="Close Presentation Menu" onClick={this.props.closePresMode}>
+                    <FontAwesomeIcon icon="times" size="lg" />
+                </button>
+                <div className="presMenu-dragger" onPointerDown={this.dragStart} style={{ width: "20px" }} />
+            </div >
+        );
+    }
+
+
+
+
+}
\ No newline at end of file
diff --git a/src/client/views/presentationview/PresentationView.scss b/src/client/views/presentationview/PresentationView.scss
index 2bb0ec8c8..97cbd4a24 100644
--- a/src/client/views/presentationview/PresentationView.scss
+++ b/src/client/views/presentationview/PresentationView.scss
@@ -1,7 +1,7 @@
 .presentationView-cont {
     position: absolute;
     background: white;
-    z-index: 1;
+    z-index: 2;
     box-shadow: #AAAAAA .2vw .2vw .4vw;
     right: 0;
     top: 0;
@@ -19,6 +19,17 @@
     -ms-user-select: none;
     user-select: none;
     transition: all .1s;
+    //max-height: 250px;
+
+    
+
+    .documentView-node {
+        // height: auto !important;
+        // width: aut !important;
+        position: absolute;
+        z-index: 1;
+    }
+
 }
 
 .presentationView-item-above {
@@ -55,7 +66,7 @@
     padding-bottom: 3px;
     font-size: 25px;
     display: inline-block;
-    width: calc(100% - 160px);
+    width: calc(100% - 200px);
 }
 
 .presentation-icon {
diff --git a/src/client/views/presentationview/PresentationView.tsx b/src/client/views/presentationview/PresentationView.tsx
index e25725275..4fe9d3a1b 100644
--- a/src/client/views/presentationview/PresentationView.tsx
+++ b/src/client/views/presentationview/PresentationView.tsx
@@ -4,7 +4,7 @@ import { observable, action, runInAction, reaction, autorun } from "mobx";
 import "./PresentationView.scss";
 import { DocumentManager } from "../../util/DocumentManager";
 import { Utils } from "../../../Utils";
-import { Doc, DocListCast, DocListCastAsync } from "../../../new_fields/Doc";
+import { Doc, DocListCast, DocListCastAsync, WidthSym } from "../../../new_fields/Doc";
 import { listSpec } from "../../../new_fields/Schema";
 import { Cast, NumCast, FieldValue, PromiseValue, StrCast, BoolCast } from "../../../new_fields/Types";
 import { Id } from "../../../new_fields/FieldSymbols";
@@ -12,10 +12,12 @@ import { List } from "../../../new_fields/List";
 import PresentationElement, { buttonIndex } from "./PresentationElement";
 import { library } from '@fortawesome/fontawesome-svg-core';
 import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
-import { faArrowRight, faArrowLeft, faPlay, faStop, faPlus, faTimes, faMinus, faEdit } from '@fortawesome/free-solid-svg-icons';
+import { faArrowRight, faArrowLeft, faPlay, faStop, faPlus, faTimes, faMinus, faEdit, faEye } from '@fortawesome/free-solid-svg-icons';
 import { Docs } from "../../documents/Documents";
 import { undoBatch, UndoManager } from "../../util/UndoManager";
 import PresentationViewList from "./PresentationList";
+import PresModeMenu from "./PresentationModeMenu";
+import { CollectionDockingView } from "../collections/CollectionDockingView";
 
 library.add(faArrowLeft);
 library.add(faArrowRight);
@@ -25,6 +27,7 @@ library.add(faPlus);
 library.add(faTimes);
 library.add(faMinus);
 library.add(faEdit);
+library.add(faEye);
 
 
 export interface PresViewProps {
@@ -32,6 +35,7 @@ export interface PresViewProps {
 }
 
 const expandedWidth = 400;
+const presMinWidth = 300;
 
 @observer
 export class PresentationView extends React.Component<PresViewProps>  {
@@ -62,6 +66,8 @@ export class PresentationView extends React.Component<PresViewProps>  {
     //Variable that holds reference to title input, so that new presentations get titles assigned.
     @observable titleInputElement: HTMLInputElement | undefined;
     @observable PresTitleChangeOpen: boolean = false;
+    @observable presMode: boolean = false;
+
 
     @observable opacity = 1;
     @observable persistOpacity = true;
@@ -84,6 +90,7 @@ export class PresentationView extends React.Component<PresViewProps>  {
 
     //The first lifecycle function that gets called to set up the current presentation.
     async componentWillMount() {
+
         this.props.Documents.forEach(async (doc, index: number) => {
 
             //For each presentation received from mainContainer, a mapping is created.
@@ -361,11 +368,16 @@ export class PresentationView extends React.Component<PresViewProps>  {
             //checking if curDoc has navigation open
             let curDocButtons = this.presElementsMappings.get(curDoc)!.selected;
             if (curDocButtons[buttonIndex.Navigate]) {
-                DocumentManager.Instance.jumpToDocument(curDoc, false);
+                this.jumpToTabOrRight(curDocButtons, curDoc);
             } else if (curDocButtons[buttonIndex.Show]) {
                 let curScale = DocumentManager.Instance.getScaleOfDocView(this.childrenDocs[fromDoc]);
-                //awaiting jump so that new scale can be found, since jumping is async
-                await DocumentManager.Instance.jumpToDocument(curDoc, true);
+                if (curDocButtons[buttonIndex.OpenRight]) {
+                    //awaiting jump so that new scale can be found, since jumping is async
+                    await DocumentManager.Instance.jumpToDocument(curDoc, true);
+                } else {
+                    await DocumentManager.Instance.jumpToDocument(curDoc, false, undefined, doc => CollectionDockingView.Instance.AddTab(undefined, doc, undefined));
+                }
+
                 let newScale = DocumentManager.Instance.getScaleOfDocView(curDoc);
                 curDoc.viewScale = newScale;
 
@@ -378,9 +390,15 @@ export class PresentationView extends React.Component<PresViewProps>  {
             return;
         }
         let curScale = DocumentManager.Instance.getScaleOfDocView(this.childrenDocs[fromDoc]);
+        let curDocButtons = this.presElementsMappings.get(docToJump)!.selected;
 
-        //awaiting jump so that new scale can be found, since jumping is async
-        await DocumentManager.Instance.jumpToDocument(docToJump, willZoom);
+
+        if (curDocButtons[buttonIndex.OpenRight]) {
+            //awaiting jump so that new scale can be found, since jumping is async
+            await DocumentManager.Instance.jumpToDocument(docToJump, willZoom);
+        } else {
+            await DocumentManager.Instance.jumpToDocument(docToJump, willZoom, undefined, doc => CollectionDockingView.Instance.AddTab(undefined, doc, undefined));
+        }
         let newScale = DocumentManager.Instance.getScaleOfDocView(curDoc);
         curDoc.viewScale = newScale;
         //saving the scale that user was on
@@ -391,6 +409,18 @@ export class PresentationView extends React.Component<PresViewProps>  {
     }
 
     /**
+     * This function  checks if right option is clicked on a presentation element, if not it does open it as a tab
+     * with help of CollectionDockingView.
+     */
+    jumpToTabOrRight = (curDocButtons: boolean[], curDoc: Doc) => {
+        if (curDocButtons[buttonIndex.OpenRight]) {
+            DocumentManager.Instance.jumpToDocument(curDoc, false);
+        } else {
+            DocumentManager.Instance.jumpToDocument(curDoc, false, undefined, doc => CollectionDockingView.Instance.AddTab(undefined, doc, undefined));
+        }
+    }
+
+    /**
      * Async function that supposedly return the doc that is located at given index.
      */
     getDocAtIndex = async (index: number) => {
@@ -434,22 +464,6 @@ export class PresentationView extends React.Component<PresViewProps>  {
                 }
             }
 
-            //removing it from the backUp of selected Buttons
-            // let castedList = Cast(this.presButtonBackUp.selectedButtonDocs, listSpec(Doc));
-            // if (castedList) {
-            //     castedList.forEach(async (doc, indexOfDoc) => {
-            //         let curDoc = await doc;
-            //         let curDocId = StrCast(curDoc.docId);
-            //         if (curDocId === removedDoc[Id]) {
-            //             if (castedList) {
-            //                 castedList.splice(indexOfDoc, 1);
-            //                 return;
-            //             }
-            //         }
-            //     });
-
-            // }
-            //removing it from the backUp of selected Buttons
 
             let castedList = Cast(this.presButtonBackUp.selectedButtonDocs, listSpec(Doc));
             if (castedList) {
@@ -487,13 +501,16 @@ export class PresentationView extends React.Component<PresViewProps>  {
         }
     }
 
+    /**
+     * An alternative remove method that removes a doc from presentation by its actual
+     * reference.
+     */
     public removeDocByRef = (doc: Doc) => {
         let indexOfDoc = this.childrenDocs.indexOf(doc);
         const value = FieldValue(Cast(this.curPresentation.data, listSpec(Doc)));
         if (value) {
             value.splice(indexOfDoc, 1)[0];
         }
-        //this.RemoveDoc(indexOfDoc, true);
         if (indexOfDoc !== - 1) {
             return true;
         }
@@ -579,18 +596,40 @@ export class PresentationView extends React.Component<PresViewProps>  {
 
     //The function that starts or resets presentaton functionally, depending on status flag.
     @action
-    startOrResetPres = () => {
+    startOrResetPres = async () => {
         if (this.presStatus) {
             this.resetPresentation();
         } else {
             this.presStatus = true;
-            this.startPresentation(0);
+            let startIndex = await this.findStartDocument();
+            this.startPresentation(startIndex);
             const current = NumCast(this.curPresentation.selectedDoc);
-            this.gotoDocument(0, current);
+            this.gotoDocument(startIndex, current);
         }
         this.curPresentation.presStatus = this.presStatus;
     }
 
+    /**
+     * This method is called to find the start document of presentation. So
+     * that when user presses on play, the correct presentation element will be
+     * selected.
+     */
+    findStartDocument = async () => {
+        let docAtZero = await this.getDocAtIndex(0);
+        if (docAtZero === undefined) {
+            return 0;
+        }
+        let docAtZeroPresId = StrCast(docAtZero.presentId);
+
+        if (this.groupMappings.has(docAtZeroPresId)) {
+            let group = this.groupMappings.get(docAtZeroPresId)!;
+            let lastDoc = group[group.length - 1];
+            return this.childrenDocs.indexOf(lastDoc);
+        } else {
+            return 0;
+        }
+    }
+
     //The function that resets the presentation by removing every action done by it. It also
     //stops the presentaton.
     @action
@@ -805,60 +844,159 @@ export class PresentationView extends React.Component<PresViewProps>  {
         this.curPresentation.title = newTitle;
     }
 
-    addPressElem = (keyDoc: Doc, elem: PresentationElement) => {
-        this.presElementsMappings.set(keyDoc, elem);
+    /**
+     * On pointer down element that is catched on resizer of te
+     * presentation view. Sets up the event listeners to change the size with
+     * mouse move.
+     */
+    _downsize = 0;
+    onPointerDown = (e: React.PointerEvent) => {
+        this._downsize = e.clientX;
+        document.removeEventListener("pointermove", this.onPointerMove);
+        document.removeEventListener("pointerup", this.onPointerUp);
+        document.addEventListener("pointermove", this.onPointerMove);
+        document.addEventListener("pointerup", this.onPointerUp);
+        e.stopPropagation();
+        e.preventDefault();
+    }
+    /**
+     * Changes the size of the presentation view, with mouse move.
+     * Minimum size is set to 300, so that every button is visible.
+     */
+    @action
+    onPointerMove = (e: PointerEvent) => {
+
+        this.curPresentation.width = Math.max(window.innerWidth - e.clientX, presMinWidth);
+    }
+
+    /**
+     * The method that is called on pointer up event. It checks if the button is just
+     * clicked so that presentation view will be closed. The way it's done is to check 
+     * for minimal pixel change like 4, and accept it as it's just a click on top of the dragger.
+     */
+    @action
+    onPointerUp = (e: PointerEvent) => {
+        if (Math.abs(e.clientX - this._downsize) < 4) {
+            let presWidth = NumCast(this.curPresentation.width);
+            if (presWidth - presMinWidth !== 0) {
+                this.curPresentation.width = 0;
+            }
+        }
+        document.removeEventListener("pointermove", this.onPointerMove);
+        document.removeEventListener("pointerup", this.onPointerUp);
     }
 
+    /**
+     * This function gets triggered on click of the dragger. It opens up the
+     * presentation view, if it was closed beforehand.
+     */
+    togglePresView = (e: React.MouseEvent) => {
+        e.stopPropagation();
+        e.preventDefault();
+        let width = NumCast(this.curPresentation.width);
+        if (width === 0) {
+            this.curPresentation.width = presMinWidth;
+        }
+    }
+    /**
+     * This function is a setter that opens up the 
+     * presentation mode, by setting it's render flag
+     * to true. It also closes the presentation view.
+     */
+    @action
+    openPresMode = () => {
+        if (!this.presMode) {
+            this.curPresentation.width = 0;
+            this.presMode = true;
+        }
+    }
+
+    /**
+     * This function closes the presentation mode by setting its
+     * render flag to false. It also opens up the presentation view.
+     * By setting it to it's minimum size.
+     */
+    @action
+    closePresMode = () => {
+        if (this.presMode) {
+            this.presMode = false;
+            this.curPresentation.width = presMinWidth;
+        }
+
+    }
+
+    /**
+     * Function that is called to render the presentation mode, depending on its flag.
+     */
+    renderPresMode = () => {
+        if (this.presMode) {
+            return <PresModeMenu next={this.next} back={this.back} startOrResetPres={this.startOrResetPres} presStatus={this.presStatus} closePresMode={this.closePresMode} />;
+        } else {
+            return (null);
+        }
+
+    }
 
     render() {
 
         let width = NumCast(this.curPresentation.width);
 
         return (
-            <div className="presentationView-cont" onPointerEnter={action(() => !this.persistOpacity && (this.opacity = 1))} onPointerLeave={action(() => !this.persistOpacity && (this.opacity = 0.4))} style={{ width: width, overflow: "hidden", opacity: this.opacity, transition: "0.7s opacity ease" }}>
-                <div className="presentationView-heading">
-                    {this.renderSelectOrPresSelection()}
-                    <button title="Close Presentation" className='presentation-icon' onClick={this.closePresentation}><FontAwesomeIcon icon={"times"} /></button>
-                    <button title="Add Presentation" className="presentation-icon" style={{ marginRight: 10 }} onClick={() => {
-                        runInAction(() => { if (this.PresTitleChangeOpen) { this.PresTitleChangeOpen = false; } });
-                        runInAction(() => this.PresTitleInputOpen ? this.PresTitleInputOpen = false : this.PresTitleInputOpen = true);
-                    }}><FontAwesomeIcon icon={"plus"} /></button>
-                    <button title="Remove Presentation" className='presentation-icon' style={{ marginRight: 10 }} onClick={this.removePresentation}><FontAwesomeIcon icon={"minus"} /></button>
-                    <button title="Change Presentation Title" className="presentation-icon" style={{ marginRight: 10 }} onClick={() => {
-                        runInAction(() => { if (this.PresTitleInputOpen) { this.PresTitleInputOpen = false; } });
-                        runInAction(() => this.PresTitleChangeOpen ? this.PresTitleChangeOpen = false : this.PresTitleChangeOpen = true);
-                    }}><FontAwesomeIcon icon={"edit"} /></button>
+            <div>
+                <div className="presentationView-cont" onPointerEnter={action(() => !this.persistOpacity && (this.opacity = 1))} onPointerLeave={action(() => !this.persistOpacity && (this.opacity = 0.4))} style={{ width: width, overflowY: "scroll", overflowX: "hidden", opacity: this.opacity, transition: "0.7s opacity ease" }}>
+                    <div className="presentationView-heading">
+                        {this.renderSelectOrPresSelection()}
+                        <button title="Close Presentation" className='presentation-icon' onClick={this.closePresentation}><FontAwesomeIcon icon={"times"} /></button>
+                        <button title="Open Presentation Mode" className="presentation-icon" style={{ marginRight: 10 }} onClick={this.openPresMode}><FontAwesomeIcon icon={"eye"} /></button>
+                        <button title="Add Presentation" className="presentation-icon" style={{ marginRight: 10 }} onClick={() => {
+                            runInAction(() => { if (this.PresTitleChangeOpen) { this.PresTitleChangeOpen = false; } });
+                            runInAction(() => this.PresTitleInputOpen ? this.PresTitleInputOpen = false : this.PresTitleInputOpen = true);
+                        }}><FontAwesomeIcon icon={"plus"} /></button>
+                        <button title="Remove Presentation" className='presentation-icon' style={{ marginRight: 10 }} onClick={this.removePresentation}><FontAwesomeIcon icon={"minus"} /></button>
+                        <button title="Change Presentation Title" className="presentation-icon" style={{ marginRight: 10 }} onClick={() => {
+                            runInAction(() => { if (this.PresTitleInputOpen) { this.PresTitleInputOpen = false; } });
+                            runInAction(() => this.PresTitleChangeOpen ? this.PresTitleChangeOpen = false : this.PresTitleChangeOpen = true);
+                        }}><FontAwesomeIcon icon={"edit"} /></button>
+                    </div>
+                    <div className="presentation-buttons">
+                        <button title="Back" className="presentation-button" onClick={this.back}><FontAwesomeIcon icon={"arrow-left"} /></button>
+                        {this.renderPlayPauseButton()}
+                        <button title="Next" className="presentation-button" onClick={this.next}><FontAwesomeIcon icon={"arrow-right"} /></button>
+                    </div>
+
+                    <PresentationViewList
+                        mainDocument={this.curPresentation}
+                        deleteDocument={this.RemoveDoc}
+                        gotoDocument={this.gotoDocument}
+                        groupMappings={this.groupMappings}
+                        PresElementsMappings={this.presElementsMappings}
+                        setChildrenDocs={this.setChildrenDocs}
+                        presStatus={this.presStatus}
+                        presButtonBackUp={this.presButtonBackUp}
+                        presGroupBackUp={this.presGroupBackUp}
+                        removeDocByRef={this.removeDocByRef}
+                        clearElemMap={() => this.presElementsMappings.clear()}
+                    />
+                    <input
+                        type="checkbox"
+                        onChange={action((e: React.ChangeEvent<HTMLInputElement>) => {
+                            this.persistOpacity = e.target.checked;
+                            this.opacity = this.persistOpacity ? 1 : 0.4;
+                        })}
+                        checked={this.persistOpacity}
+                        style={{ position: "absolute", bottom: 5, left: 5 }}
+                        onPointerEnter={action(() => this.labelOpacity = 1)}
+                        onPointerLeave={action(() => this.labelOpacity = 0)}
+                    />
+                    <p style={{ position: "absolute", bottom: 1, left: 22, opacity: this.labelOpacity, transition: "0.7s opacity ease" }}>opacity {this.persistOpacity ? "persistent" : "on focus"}</p>
                 </div>
-                <div className="presentation-buttons">
-                    <button title="Back" className="presentation-button" onClick={this.back}><FontAwesomeIcon icon={"arrow-left"} /></button>
-                    {this.renderPlayPauseButton()}
-                    <button title="Next" className="presentation-button" onClick={this.next}><FontAwesomeIcon icon={"arrow-right"} /></button>
+                <div className="mainView-libraryHandle"
+                    style={{ cursor: "ew-resize", right: `${width - 10}px`, backgroundColor: "white", opacity: this.opacity, transition: "0.7s opacity ease" }}
+                    onPointerDown={this.onPointerDown} onClick={this.togglePresView}>
+                    <span title="library View Dragger" style={{ width: "100%", height: "100%", position: "absolute" }} />
                 </div>
-                <input
-                    type="checkbox"
-                    onChange={action((e: React.ChangeEvent<HTMLInputElement>) => {
-                        this.persistOpacity = e.target.checked;
-                        this.opacity = this.persistOpacity ? 1 : 0.4;
-                    })}
-                    checked={this.persistOpacity}
-                    style={{ position: "absolute", bottom: 5, left: 5 }}
-                    onPointerEnter={action(() => this.labelOpacity = 1)}
-                    onPointerLeave={action(() => this.labelOpacity = 0)}
-                />
-                <p style={{ position: "absolute", bottom: 1, left: 22, opacity: this.labelOpacity, transition: "0.7s opacity ease" }}>opacity {this.persistOpacity ? "persistent" : "on focus"}</p>
-                <PresentationViewList
-                    mainDocument={this.curPresentation}
-                    deleteDocument={this.RemoveDoc}
-                    gotoDocument={this.gotoDocument}
-                    groupMappings={this.groupMappings}
-                    PresElementsMappings={this.presElementsMappings}
-                    setChildrenDocs={this.setChildrenDocs}
-                    presStatus={this.presStatus}
-                    presButtonBackUp={this.presButtonBackUp}
-                    presGroupBackUp={this.presGroupBackUp}
-                    removeDocByRef={this.removeDocByRef}
-                    clearElemMap={() => this.presElementsMappings.clear()}
-                />
+                {this.renderPresMode()}
+
             </div>
         );
     }